Facebook apologized Monday to a reproductive rights activist who posted detailed written instructions for a Do It Yourself abortion. The apology said the instructions were deleted on accident because they were mistakenly thought to be in violation of Facebook’s Statement of Rights and Responsibilities.

“”Our policies are enforced by a team of reviewers in several offices across the globe,” Facebook explained inits apology. “This team looks at hundreds of thousands of reports every week, and as you might expect, occasionally, we make a mistake and remove a piece of content we shouldn’t have.”

Rebecca Gomperts wrote the original post and works at Women on Web, an abortion rights group based in the Netherlands. She said Facebook deleted her original post — along with a screenshot she posted of the warning they sent to her after the original post was deleted.

“We are very happy to report that Facebook reversed its censorship of Dr. Gomperts post on how to use misoprostol for safe abortion,” the woman’s group posted on Monday. “Thank you to everyone who contacted Facebook and posted the information on your own sites in solidarity!”

Gomperts has re-posted the “how to” abortion piece on her Facebook page. The World Health Organization sanctions the instructions, which prescribe misoprostol (an ulcer drug) and mifepristone to terminate a first-term pregnancy.